Alizarin Tetris

What is it?: An open-source Tetris clone, 2001. There are binaries for Windows, Debian Linux, and, thanks to Eugenia Loli-Queru, BeOS.
What computer or emulator will it run on?: No system requirements are given.
Similar Games: Tetris Queen, ACiD Tetris, BlueCube.

Alizarin Tetris is a Tetris-like game with a twist for Unix, Win32 and BeOS systems. It includes multi-player support, user-extensible color, shape and sound styles, can use TCP/IP networking and features a few different AI opponents. It was written using the SDL Library.

Alizarin Tetris Homepage